To export feedback and feedback data, click the class you want to print feedback for and then go to the Class Settings in the top menu. Scroll down to "Export" and the first option for exporting will be "Export Feedback". This will export submissions and corresponding feedback as a .csv-file for all assignments.
To save or print off the feedback from the results page, go to the page you would like to print and right click. Select print. Once the print window comes up you can select the printer or chose to save as a PDF by changing the printer.