Eligibility criteria for appearing in MBA exams like CAT, CMAT and for admission in most of the colleges is to have minimum 50% percentage in 10th 12th and graduation for general category students and 45% for SC/ST category students. 

As you have more than 50% in 10th 12th and graduation then yes you are eligible for pursuing MBA degree.

But as your academic records are not that good which are also one of the parameters used by college in order to students for next round of interview and WSAT. So as to get a call from top reputated colleges you need to aim for a very high percentile in MBA exams.

You also have an advantage of being a non engineer. Because of this colleges give you some extra marks in order to promote diversity in their college. Also generally you get a call at a little lower percentile than the engineering student of same category.

But in order to take the use of this perk in getting admission in top college, you need to aim for a very high percentile.

All the best!!