My Fussy Number

As the required number is divisible by 5, the digit place must be 5.
As it is greater than 500, the hundred place is 6, 7 or 9 (5 is already used).
Ten place can be chosen among the remaining four digits.
Answer $=1\times 3\times 4=12$

As the number has to be divisible by $5$ , its last digit is $5$ . Then, the hundreds digit could be $6,7$ or $9$ , and the tens digit could be any of the six numbers without counting the hundreds digit either $5$ .

It can be formed $3\times 4\times 1=\boxed{12 \text{ numbers}}$