I spent some time gathering info on this subject, and although there seems to be a lot written on the topic, none of the pages I read put it all together. This really is way simpler than people imagine.
Within Storyline, create a user variable NUMBER type called usrScorePoints - the data type must match the Results. For example, you can't set a usrScorePoints TEXT variable to the Results.ScorePoints. You can create a new user var for each of the scores/percents - all of which are NUMBER variables.
usrScorePercent for Results.ScorePercent
usrScorePoints for Results.ScorePoints
usrPassPercent for Results.PassPercent
usrPassPoints for Results.PassPoints
Create a trigger on the Results slide, and set the Action to Adjust variable usrScorePoints = Results.ScorePoints system var when Timeline starts. Do this for all the user vars.
I created a custom Completion Certification that uses usrName and the pass/fail data to generate an HTML certificate as well as an encrypted code that includes the date, name, and score - I can use that to validate a learner's score in a CBT. I could just as well write a script to update an LMS if I needed to.