Verified answer

y = 3 sin(2x – 5) – 3 = y = 3 sin(2[x – 2.5]) – 3

So phase shift is 2.5 units to the right.

In order to have a shift, you need to specify a base function. Your question doesn't have a base function to compare to, so it doesn't make sense.

It's like asking "What is the difference of 43?"