It sounds like you are talking about applying to the nursing program before you take your preclinicals.
If you are talking about the nursing information session before your preclinicals, I believe attendance is required in order to apply to the Nursing Program. It will also help you understand about the ranking system and will also give you a general feel of what is expected of you and what is not tolerated, etc.
I don't remember what a score of 70 would mean, but if you have any difficulty with critical thinking and comprehension, it is best to get a good solid background in reading skills before you get bogged down in Anatomy and Psychology courses, because those science courses move really fast with a LOT of tedious reading. THe more skills you have in reading, the better grades you will make if you work hard, I think, so if you have some weaknesses in math or reading, slow down and get the help you need before you realize how hard it gets. I'm a good reader, but the amount of material and the reading skills to read it are demanding. Detail is important--especially with anatomy phys.
Application fee: It's been several years, but there was a DelTech registration fee for classes and also a nursing school application fee. They will tell all of that stuff in the orientation, so yes, orientation is a good place to get more info and also you can ask to consult with someone at the school about what to do for what scores you have on testing.