Answer: To find the tip amount in dollars for each order, you need to multiply the total bill amount by the tip percentage.
For the first order of 4 dishes, the total bill amount is $8 per dish * 4 dishes = $<<8*4=32>>32.
The tip amount is $32 * 20% = $6.40.
For the second order of 6 dishes, the total bill amount is $8 per dish * 6 dishes = $<<8*6=48>>48.
The tip amount is $48 * 14% = $6.72.
For the third order of 7 dishes, the total bill amount is $8 per dish * 7 dishes = $<<8*7=56>>56.
The tip amount is $56 * 11% = $6.16.
So, the tip amounts from least to greatest are $6.16, $6.40, and $6.72.