You can run an audit for individual students via Student Data>Modify Student>Audit. You can search for UPDATE, INSERTS, and DELETES on this page.
If it is an insert audit, there will be no values in the "old value" or "new value" field.
If it is an update audit, there will be a value in the "new value" field, showing a change has been made.
If it a deleted audit, it will say "deleted record."
This screen could be more helpful than the bigger audit via Administration>Audit Trail if you just need to track down a change for one individual student.
You can search by Object, User, Key, and a From / Thru date field.
Example below:
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