logical deduction - Next number in the following sequence?

In following sequence, Find the next number?

85, 79, 73, 69, ?

Answer

The values are in the reverse order of ASCII values of the Vowels
85, 79, 73, 69 equals to

U, O, I, E

So A's equivalent ASCII code is $65$

One more possible

The difference of 85 - 79 = 6
The difference of 79 - 73 = 6
The difference of 73 - 69 = 4
The difference of 69 - x = 4

So, x = 69 - 4 => 65