This sentence is “information dense”; it is using very few words to convey a great deal of information.
Your interpretation is partially correct; Nordstrom was ‘going with’ Ms Trump’s brand (that is, Nordstrom stores were selling merchandise from the company) prior to February, 2017 - though the article doesn’t indicate whether it started to do so in 2014 or later. It apparently ceased to do so at that time, and citing “brand performance” indicates that Nordstrom gave as the reason for no longer selling the brand that they were not selling sufficient merchandise to make it worthwhile to continue to do so.
Summary of that sentence:
- Ms Trump’s brand was created in 2014.
- Nordstrom was selling merchandise branded with Ms Trump’s brand, but we don’t know when they started to do so.
- Nordstrom stopped selling merchandise branded with Ms Trump’s brand in February of 2017.
- Nordstrom said that they were not selling enough of Ms Trump’s merchandise to make it worthwhile for them to continue to do so, and this is why they stopped.