Junaid,
Your score results are good. Were I you, I would take the exam at this point. However, I find myself a little hesitant to agree with a statement about being "in the safe zone." There are no guarantees in life and that applies to the PMP exam in spades!
I would rather say , based on the experience of others who have studied, taken the practice exams and scored in the range you're scoring in, that you have a high probability of passing the exam. Perhaps it's just Monday Morning hyper caution on my part.
In any case, best wishes and best of luck when you sit for the exam!
Tracy