Hey Naga,

It is completely depended on the purpose for what  you are taking the exam.

If you are going for higher education then 6 or 6.5 band score with a minimum score of 6 in each module is considered as good

If you are going for PR or immigraion or any job then 7 band score in each module is compulsory.

In case of a doctor is opting to work as a locum then 7.5 band with a minimum 7 in each module is a good score.

and the overall band 5 is not at all good, as you can see All the above details.

All the best