Maam I have been in 70s throughout my academics then what is minimum percentile required for IIM Jammu?

Admission at IIM Jammu is a three-stage process. It comprises 

1. Shortlisting on the basis of CAT score
2. WAT-PI round
3. Final selection

Every IIM has its own criteria for selection. They generally follow different parameters for shortlisting the candidates. Weightage is given to academics, points for each level starting from X, XII, and graduation.

The CAT cutoff for a General Category Male at IIM Jammu is

• Verbal Ability & Reading Comprehension Percentile: 65
• Data Interpretation & Logical Reasoning Percentile: 65
• Quantitative Ability Percentile: 65
• Overall Percentile: 90

Now considering your profile, you must score a percentile between 80 and 90 to get a call letter from them.