Use the magnifying glass icon at the top right of your screen to search for a specific applicant to locate their assessment score. More info: How do I search for a specific applicant?
If the applicant has not completed the assessment, the words "Show URL/Link" will be visible. This exists so that you can re-send the applicant the link to their assessment if they do not complete it within a reasonable amount of time.
Here's a brief video that explains where to view assessment scores and how to interpret them: