I am assuming you are from general category. Based on your overall academic profile, you will need to score atleast 96 percentile to get a call for the next round.

All the best!

Admission to IIM Ranchi will be based on the performance of candidates in the CAT, Written Ability Test, and Personal Interview and also based on their profile.

You require minimum 90 percentile in CAT entrance exam to apply, you can check the overall information regarding the sectional cutoff & weightage with the given below link.

IIM Ranchi Admission Eligibility

Good Luck!