93.8 percentile in CAT - Qualified Chartered accountant with 15 months work ex,90+ percentage in xth, xiith both can I expect any old IIM calls?

No, old IIMs will not give you a call.

if you are a non engineer than you have higher chances of getting call from IIM Indore

IIMA is possible. I know people (general category) from non-engineering backgrounds with an experience who have got IIMA calls at 90%ile too and converted it