Here ya go. Thanks for the support guys!
the scale is a number out of 4. The definition of good varies, but most people agree it is somewhere between 3.5 and 3.75
that 68% is a good score in India. A collegue told me 60%+ is class A. (In the US 68% is barely a passing score and not one you'd put in a resume
You always wanted to do it. Why do you want to tie it down to your career?
I don't know. Statistics have different implications depending on the country
Consider joining Toastmasters International.
It is amazing how quickly something can be lost if it is not used.