I bet he is not going to ask this question as he never admitted that there was any pricing issue.
Ever since he issued a memo (both to the market and Apple employees) that iPhone unit sales have actually been declining (actually in the last few years), and of all the red herring reasons he listed (soft Chines market is one

, he never ever admitted nor even mentioned that the overpricing was the issue.
Having said that, your question is meant to be a hypothetical question (and very legitimate).
I would say $200 less across all "X" models and the sales will explode, and he can still maintain the "total" profit level he wanted to maintain. High (excess) profit level and fewer unit sales number, or the appropriate and fair price level and exploding unit sales. But in doing this, he has to forget about this image of iPhone being for the well-to-dos, high end or luxury items etc., at least to some extent. Memory (storage) price alone has so much built-in markup (memory is a cheap commodity now and Apple can buy them at incredibly low cost now. For the Xs" for example, bumping the storage capacity fro 64Gb to 128Gb cost you $150 and 128Gb to 512Gb at $200? And how many memories Apple sells this way?).
Another way to boost the sales is to maintain the current price level but include the AirPod for example in the package.
This will also trigger the increased sales of all iPhone related accessories (still expensive) such as the cables, dongles, AirPods, and battery cases, you name it. Simple

If Apple would (could) do this, I will bow down my head and thank Apple profusely, lol.