Each red dot represent 1 data point.
Since, it's build using Graph Builder, you can turn on the graph builder control panel to check out the settings (i.e whether your box & whisker plot used outlier plot or quantile plot).
If quantile plot, you would see the lines in the box & whisker plot are similar to the quantile summary in distribution platform
![WebDesignesCrow_0-1696294425382.png WebDesignesCrow_0-1696294425382.png](https://community.jmp.com/t5/image/serverpage/image-id/57172i6AFABA766DB5E508/image-size/medium?v=v2&px=400)