Billy, Thank you for your inputs. I should have mentioned my preparation strategy in the original post. I used Mike Griffin's book and read it 2 times, made notes, went through its questions.
Gave Prepcast four tests and analyzed all questions. I used Head First Agile Book only for its full test. Although I feel like that I have covered a good amount of ACP material and prepared myself for "Agile Mindset",
I am still not able to score above 80% which is causing some confusion in my mind about my readiness.
And I agree with you that there's not much more I can do.
Thank you anyways!