Each IIM has its own admission criteria, Most of the IIMs give maximum weightage to Personal Interview and CAT score for admissions. However, factors like academic cut-offs, past academic performance, relevant work experience, gender diversity etc. also play a major role in the final selection. Based on all this factors the students are called for interview and WSAT round. 

If you are expecting 90 percentile in CAT, As a General category you can have the chances in New IIMs. You can also prefer the below given article for the further information.

https://bschool.careers360.com/articles/iim-admission-criteria

Good Luck!