This solution gives you a form and workflow configured to parse the repeating section of the form automatically.
Parsing a Nintex Forms repeating section in Nintex Workflow is a little different in Office 365. The main reason is this. When you have a Nintex Form on a list, the data from an instance of that form is used to create an item in a list, but there is also some part that is store in XML, in a field on the item called NFFormData.
Nintex Workflow O365
Nintex Forms O365
Visit the blog site for instructions on how to install and configure the workflows and forms template.