Emmy Awards Evening/cocktail dresses are even trickier for tall women if you're wearing heels. I would not go mono-color/mono-texture, as with this dress, and I'd especially not use such a strong color if I did.
The detailing on the back of this sweater makes it unique. The more voluminous top and tailored pants are a good combo. The showing of skin on the back makes this traditional outfit feel modern and sexy.