You could try the following approach.
1. Put the questions you want shuffled into their own category in the question bank, e.g. "Cat A" with 5 questions.
2. Create the section, but don't set the "Shuffle" flag.
3. Add the Description question to the section as the first question.
4. After the description question, click the link to Add > a random question, and select the category "Cat A". Set the "Number of random questions" field to 5, so that all the questions in the category will be included.
I believe that this will force all 5 questions to be presented to each student, but the order will be different in each case.
If you don't want to put them into a separate category, you could use tags instead or as a complement.
From a question organisation perspective, it is better to include the Description question within the category. I found that the selector for random questions does not include "Description" questions, which surprised me, but is quite convenient in this case.