Hi @zeenatailors
Assuming that the below highlighted column name is Status, which is just a record whether an email is sent or not.

Now let's use flow to send emails to top 80 email id to which emails need to be sent
Use list rows to list all rows in the table like below

here we have used Filter query as Status ne 'Sent' , so to filter the rows whose status is not equal to sent and then we specify Top parameter to capture only top 80 emails.
Once we capture it, we will use send email action to send the email and update Status column as sent accordingly.

Hope this helps you !
Mark it as solution if it resolves your query