With the 10.7.3 July 2017 update, the Quiz setup options will now include a checkbox for randomizing the question order within a quiz. It will be possible to randomize an entire quiz, or select individual blocks of questions to be randomized (for example, keep 1-3 as-is but randomize 4-10).
Note that it will also be possible to randomize the order of sections within the quiz, so multiple sections can be moved in display order using this option.
This feature is opt-in for each quiz, so instructors will need to select the checkbox option when updating the quiz settings.