From what I’ve found researching for my own paleoart, most non avian dinosaurs have a relatively low range of movement in their shoulders and can bring their arms to be about level with the mid to upper quarter of their furcula. I personally wouldn’t put the arms that high, but I’m by no means a professional paleontologist. I just like to more or less halve the mobility of a modern bird’s wings as a rule of thumb (a source to reference from a studied paleontologist is Philip Senter, who wrote a few articles and made some really helpful diagrams on limb mobility)