Then what will assure , what is the process plz. Explain i,m confused someone say 95%ile is required, someone say its for IITians , someone say full academic results and so on .....

It not like that only IIT students get admission in IIM. You have scored a very good percentile but only IIM's decide their selection criteria. Wait for the new cut offs release. For the time being you can also apply for the Top B-School such as MDI, Xavier etc. they come just after IIM's . Don't panic wait for the call. Or you can contact on the admission helpline numbers of the IIM's they might give you some key information.