Your scores in graduation really matters when you look out for a good college for post graduation. Every good colleges, be it an MBA college or college offering Mcom, requires at least 60% in graduation. But different colleges have different policies. Some even accept this score given you have participated in some national activities or won a competition or done any such things. 

So look out for such colleges that will give you a nice career because you'll be investing money in any course you pursue. There are some private universities that accept this score. Moreover if you score high in competitive exams like MAT or CMAT then also you can have some options opened to you. 

And just believe that plethora of opportunities are there. You just have to find them.