Hi aspirant. Hope you are doing well. First of all, congratulations to you for clearing Higher secondary certificate exam( HSC) . You have scored good marks in your examination. If you have doubt about your marks, you have one option which is revaluation. You have cleared your examination you don't need to give examination again. You call fill the revaluation form consulting your school's operations staff. After filling the form, your answers will be revalued. If you have done well in your examination, your marks may increase.

Best of luck.