I misspoke, peacockharpy is correct. "Sitting above the salt" doesn't mean, specifically, sitting above your social station, but that's just how Jena uses it in context in that scene. Yes, above the salt is aristocracy, and Jena is protesting that she can't sit above the salt because she's not of that class.
Clarification re: salt
Hope that clarifies.
And thanks for the explanation on cutaways!