Answer:
Statistically, it would be 72% of 8, which is 5.76.
Therefore, he will most likely make 5.76, or 6, of his throws.
You just said, "making or missing free throws doesn't change the probability that he will make his next one," so the probability of Tim Duncan making all of his next 8 free throw attempts is 50%, as it is 50/50, miss or make. But, statistically, 72% of 8 is: 8 x 0.72 = 5.76