Rishi first of all congratulations or your wonderful CAT result!!

Your percentile is good enough for you to get calls from ultra new IIMs like IIM sambalpur, Nagpur etc. and from new IIMs like IIM Rohtak, Trichy, Udaipur, Ranchi etc. but I am sorry to say you will not get call from any IIM because every IIM have a sectional cut-off along with overall cut-off and you did excellently in 2 of your sections but very poorly on one of the sections.

So for getting a call from a college and convert it you need to look for colleges which does not have sectional cut-offs like TAPMI, Goa Institute of Management, Great lakes institute of Management, Chennai, Fore school of Management Delhi etc.

If we talk about IIT then as you are an engineer so you can get call for second round of interview and WSAT from all IITs accept IIT Bombay. But again before applying for admission in any college you need to check that there is no sectional cut off. You have a very good chance of converting in IIT Madras and IIT Kanpur and if perform well in second round so also in IIT Delhi. Don't choose any other IITs other than these as other IITs are not good enough in MBA.

All the best!!