Hello Susan,
Thank you for question.
Since you are including a TN as part of moving the boxed material, your page numbering will stay in sequential order. I wrote it out below.
p. 179
Text
If you feel you need a TN explaining where text restarts. (However if a new topic is starting probably do not need a TN)
TN Text continues on p. (continuation letter)179. (only if deemed needed)
TN Box moved from p. 280
Start box
p. 179 continues with (continuation letter)179
End box
The rest of the text from pg.179
pg 280
TN Box moved to p. (continuation letter)179
p. 281-282
Text
Mike