Yes, considering your profile, you can convert IIM Indore and Shillong at 92 percentile. Your excellent academic record will compensate for your CAT score and increase your chances of getting selected.
Since you are a fresher I will suggest you analyze your career aspirations before choosing a college. What made you choose IIM only. Is it just because you want to get placed and earn a high salary? I suggest you try broadening your career options by identifying your area of interest. Some career options with their suitable colleges are
So look from a broader perspective and choose your career first. Once you are sure of that, you can choose the most suitable college and prepare accordingly.