how do rankings/scaling work??

if i am a lower rank than somebody does that mean i can’t get a better study score than them even i do better on the exam?

also, i understand that rankings are school based but how do they distribute the study scores?? is one school’s rank 1 better than another’s??

how does sac scaling work? i’ve talked to a student who did geography last year, and he said that all his sacs scaled up to 100. does this mean that our school’s sacs were hard compared to other schools?