Can I get admission in a good B-School for MBA with 85% in 10th, 82% in 12th and 58.7% in B.Com?

Yes, you can get a good B-School for MBA. You just need to clear the GD/PI or WAT/ PI, whichever is the selection process of that college after getting call for the same.

You will have to score very high in MBA entrance examinations to get admission in good B-schools. Therefore, you must put effort and take external expert coaching to crack MBA entrance exams. You can also evaluate doing CA, CFA, CMA, LLB, MCA, M.Com, etc. for other career options.