1997 328i Battery

[M5254]

I just had a Delco ACD48/91-60 put in. I have no idea what the numbers mean. In my BMW Book it says I should use a 12V 75 AH Question is the battery I put in not good enough or is it alright. I had a service station put it in and would hate to make a big deal out of it unless its absolutely the wrong one?
BMW 328i 1997 143,000

[Bimrpwr]

you will be fine.