The next stitch will also be a slip stitch, but instead of only working the stitch into the single crochet, you are also going to anchor the arch of chain stitches you created in row 5.
To do this, (insert your hook into the next sc as usual, then slip the stitches from row 5 onto your hook, then grab your thread with your hook and pull it through to complete the chain stitch. Work 3 more ordinary sl sts.) Repeat sequence inside parentheses all the way across the row.
At the end of the row, all the arches in row 5 should be anchored by stitches worked in this row.
Note: The photos shown on this page illustrate the views you would typically see as you work this row. You'll be looking at the top and back of the work. On the next page, I've included a peek at what's going on on the other side of the work, so you can get a better idea of how this row is constructed.