Hung Lee had an average grade of 92 on his first 4 business math tests. He had a 95 and a 98 on the next two tests. What was his average grade for the 6 tests?

the mistake in the pattern is that :

b. the decimal point was moved one too many place values each time

the correct pattern could be made by :

b. moving the decimal point to the right the same numbers of place values as the exponents