I got 92.46% in Mat and a composite score of 690.5 am I eligible for admission

Hi Rahul, yes you are eligible. In order to get admission in MBA course, you should give either of the exams, namely CAT, MH-CET, CMAT, MAT,etc. For MMS, you can apply through CAP rounds whereas for PGDBM you need to fill up the forms of respective colleges and then go through GDPI. Fees for NLDALMI

Thats a good score. If the college accepts mat scores as well then you can apply and with good performance in gdpi rounds you can get through. For the acceptance of scores of mat you will have to check when the college starts the admissions of pgdbm. Mat scores are also accepted for all india seats