Hi, congratulations on the great score!
If you have not tried it yet, consider changing your section order. Attempting DI first or second can help you tackle data while you are fresh and might lead to higher percentile (worked for me).
Once you cross 735+, the outcome often depends on the question mix you get on test day and how well those tougher problems align with your strengths. It usually comes down to just one or two questions. You could even give it another shot without much additional prep and likely reach the score you deserve quite comfortably.
If you are aiming for B-school next fall, I would recommend focusing on the rest of your application at this stage since that will have a greater impact than chasing small score improvements. That said, if you have the time, a higher GMAT score can still help you negotiate scholarships.
If you want some tips on improving DI, you might find this article helpful:
How to Improve Your Data Insights Score from D75 to D82