VMMC seats are filled through All India Counselling for 15% of its seats and the rest 85% are fileld through IPU. In 2019, under State Quota, 595 marks secured a seat in VMMC under General Category. That was the cut off. BHU had a cut off of  an All India Rank of 669 in NEET 2019. This loosely converts to 570-580. That was the cut off. Now this is again 2019 data and cut offs change every year. Cut offs change every year depending 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 taking into consideration both VMMC and BHU cut offs, you will need to score atleast 625. This is because both VMMC and BHU are sought after Medical Institutions and Competition is going to be tough. When the seats available are less and the competition is tough, it results in higher cut offs. So you should aim for atleast 625. Good luck.