Shubham, now all AIIMS seats will be filled through All India Quota only. You haven't mentioned your Category but if you look at previous years cut offs for AIIMS MBBS, they were as follows:

General Category: 98.83

OBC: 97.01

SC: 93.65

ST:93.65

Now AIIMS always released the score in the form of percentages and NEET results are declared in the form of marks. And AIIMS was conducted for 200 marks and NEET was conducted for 720 marks. And having said all these, cut offs depend on various factors such as no.of Candidates appearing for the exam, no.of Candidates qualified, top NEET score and difficulty of the exam. So irrespective of your Category, your NEET score should be atleast 650 and above.