70 mm film - Wikipedia, the free encyclopedia . He has become a film star - a clue to this, even if you don't know what 'on the 70 mm' (as I didn't until 2 minutes ago) is 'the siver screen' which means 'cinema'. He makes a lot of money as a film star - he 'makes a killing'.
I haven't met 'tracks' in that context. I would have used 'traces' [= goes through it step by step]. 'It tracks' makes the tracked thing sound a bit sinister - for example, military installations track missiles.
Student or Learner