A scatter chart compares two numeric measures. Each point needs an identity in the Details well; otherwise the visual aggregates the model into one point. Put the measure you want to explain on the vertical axis and the comparison measure on the horizontal axis. Size can add a third quantity, but large bubbles should not hide the smaller ones.
Use the detail level that matches the question. A store point can compare sales with orders, while a product point can compare sales with quantity. An outlier is a prompt to investigate, not proof of a data error or a causal relationship. Check whether a late-opening store, a different product mix or a very small denominator explains its position. Keep tooltips useful enough to identify the point and read its values.