The position of how many letters will change if each of the letters in the word CUSHION is arranged in alphabetical order?

Let's write the original word and its letters arranged alphabetically:
Original Word: C | U | S | H | I | O | N

Alphabetical Arrangement: C | H | I | N | O | S | U

Let's compare positions:

C → C (No change)

U → H (Changed)

S → I (Changed)

H → N (Changed)

I → O (Changed)

O → S (Changed)

N → U (Changed)

Except for 'C', all other 6 letters change their position.