Generally speaking, Wharton AdCom will look at the best subscores you have, even if they span multiple administrations of the GMAT. Of course, if the subscores are highly divergent, this may lead to further scrutiny. A slight drop in Q subscore would likely not be a big deal, though, especially if still comfortably above the 80th percentile mark.
As one of the more analytical programs in the world, Wharton does take a candidate's quantitative aptitude seriously, but AdCom is also concerned about a candidate's verbal ability. I would not say that one is taken more seriously at the expense of the other.
Given that you say that your educational background is more skewed towards the quantitative side than the verbal side, if you do not have other evidence of verbal ability (e.g., from professional work), you may be well served retaking the GMAT.
Now, to answer your question more directly, Wharton AdCom tends to look at each subscore somewhat independently. It is therefore ideal to have all subscores exceed the 80th percentile whenever reasonably possible. Generally speaking, a more balanced set of subscores above the 80th percentile is better than lopsided results.
I don't understand necessarily why your quantitative side has to go down in order for your verbal side to go up, though. It's not a zero-sum game. Yes, perhaps you will spend more time focusing on the verbal side and the quantitative side will slip a bit as a result, but if your previous quant subscore is reflective of your general aptitude and ability at this time, that quant subscore really shouldn't slip that much (from the 92nd to 80th percentile). If your quant subscore needs to slip significantly in order to bring up your verbal subscore, then there is a bigger problem and concern at stake, in my opinion. (This is also designed to deter people from trying to get a good combination score by merely focusing on the verbal side for one GMAT administration, the quantitative side for another GMAT administration, and the AWA for the third GMAT administration).
Hope this helps.