Would it be okay to stop training my neural network?
You should keep training. 

In many scenarios ~1% decrease in validation loss a bid deal in itself. However, looking at the trend it looks like you validation loss is set to decrease by more than ~1%, if you let it train form, say, 20 more epochs. The decreases will get smaller and smaller, but they will accumulate.

Generally, you should continue training if your validation loss is decreasing.