What are the chances to convert IIM Sambalpur, if my waiting is 62 EWS category in the fifth list?

It is currently too early to provide a definitive answer regarding the outcome of your question. However, there are cases where students were in a similar situation as you and become anxious as well as desperate to want a seat. It is advised to have patience and go with the flow. 

There was a case where a student had a waitlist number of 2XX, and no one was convinced that it is possible to convert at that number. However, due to various factors such as the uncertainty caused by Covid, online classes, and other factors, the waitlists may go even further than in previous years. He received an admission offer to IIM Sambalpur, which was something he had been waiting for. 

There may be many factors that come into play such as external and internal factors that may influence the process, such as batch strength. It is important to keep an open mind and have patience as the outcome may be different from what you expect.