Solved it!
I found this post which lead me to an answer.
Here’s my code:
$course_id = $data['course']->ID; //280
$coursePoint = get_field('field_56646f51fa48b', $course_id);
//Get the ID of the Point that was was assign to the Course
if( $coursePoint ):
$post = $coursePoint;
setup_postdata( $post );
$selectedCourseID = $post->ID;
wp_reset_postdata();
endif;
$value = get_field('field_56644f11d62c3', $user_ID);
$value[] = array("field_566459158d2ab" => $selectedCourseID, "field_5664598f8d2ad" => "20151206");